save() with modules where .connect() initializes device (such as RFID reader MFRC522)

Ahh, so you're saying the issue was that the NFC module wasn't initialised with onInit? Perhaps that should be in the Troubleshooting?

There's already a I TYPED save() BUT MY CONNECTED DEVICE DOESN'T WORK AT POWER ON (sorry for the caps - I copy-pasted), but it's actually very small and doesn't contain much info.

I've thought about trying to make those modules use on('init',... to initialise themselves, but to be honest I'm a bit worried. While it would help in the simple case, I wonder if the rest of the time it might actually make a whole new class of confusing errors?